Process of making patterns for triple signs.



vR. A. MILLER. PROCESS or MAKING PATTERNS FOR TRIPLE SIGNS.

APPLICATION FILED FEB.23, 1910. RENEWED MAR. 17, 1911.

990,490, Patented Apr. 25, 1911.

ru uanRls FETIns co.', WASHINGTON. n. c.

UNITED @IA. ATENT IQE.

RUDOLPH A. MILLER, 01? CINCINNATI, OHIO, ASSIGNOR TO JAMES J I-IEEKIN,CHARLES LEWIS, AND ALBERT E. I-IEEKIN, ALL OF CINCINNATI, OHIO.

PROCESS OF MAKING PATTERNS FOR TRIPLE SIGNS.

SMIL IQQ.

Specification of Letters Patent.

Patented Apr. 25, I911.

Application filed February 23, 1910, Serial No. 545,412. Renewed March17, 1911. Serial No. 615,117.

To all whom it may concern:

Be it known that I, RUDOLPH A. MILLER, a citizen of the United States ofAmerica, and resident of Cincinnati, county of Hamilton, State of Ohio,have invented certain new and useful Improvements in Processes of MakingPatterns for Triple Signs, of which the following is a specification.

This invention relates to the manufacture of triple signs, andparticularly to a method of making the patterns for delineating acharacter, or characters, on the rear face of the plate from which thestrips of the sign are to be struck up.

A triple sign is a sign which shows one character, or set of characters,when viewed directly from the front, a difierent character, or set ofcharacters, when viewed diagonally from the left, and still a differentcharacter, or set of characters, when viewed diagonally from the right.These signs are usually formed by means of two plates or sheets, one ofwhich has a series of slats struck out from it and is located in frontof the other, as illustrated in U. S. Fatent No. 386,883, granted to T.P. Heineinann, upon July 31st, 1888.

An object of this invention is to produce a new and simple method offorming a pattern for delineating the characters on the rear face of thefront plate of a triple sign. This and other objects I attain byemploying the method described in this application.

In the drawings accompanying this application and forming a partthereof, Figure 1 is a perspective view of a triple sign, as it appearswhen viewed from the left hand side. Fig. 2 is a perspective view of thesign illustrated in Fig. 1, when viewed from the right hand side. Fig. 3is an elevation of the rear plate of the sign illustrated in Figs. 1 and2. Fig. I illustrates a step in the method of producing a pattern fordelineating a character on the rear face of the front plate of the sign.Fig. 5 illustrates the completed pattern, which is illustrated in theprocess of construction in Fig. 4t.

Referring to the drawings: The triple sign consists of two members, arear plate 6 and a front plate 7. Any character, or set of characters,may be delineated on the front face of the plate 6. I have illustratedthe letter V as delineated on this plate at 8. In like manner, acharacter, or set of characters, may be delineated on the front face ofthe front plate 7. I

In Fig. l I have illustrated a sign on which the letter I is delineatedat 9.

Any character, or set of characters, may be delineated on the rear faceof the front plate, but normal characters will not appear normal, whenthe front plate is divided into strips and these strips turned at rightangles to the front plate, as illustrated in Figs. 1 and 2. It is,therefore, necessary to form a pattern for the rear face of the plate,which, when the strips are struck outward from the plate, will form thenormal sign matter, when viewed from a position at one side of the frontof the sign.

I first draw or otherwise imprint the characters which the pattern is toform when the plate is struck up, on some tracing material, such astracing cloth or other semitransparent or translucent material. In Fig.a I have illustrated the letter Y, as drawn on a section of tracingcloth 10. I then draw a series of transverse lines D across the face ofthe cloth, at a distance apart equal to the width of the slats or stripsof the sign to be formed. I may also draw a series of longitudinal linesA to guide the eye in laying off the transverse distances of the patternfrom the transverse lines, and to avoid changing the longitudinalrelations, as hereafter explained. I then turn the cloth face downward,so that the characters and lines depicted on the face are visible uponthe back of the sheet. In Fig. 5, I have illustrated the figures andlines of the normal sign matter thus seen in dotted lines, while I haveillustrated the transverse and longitudinal lines by full lines. Thepattern is illustrated by shaded figures. The transverse lines, it willbe noted, contain between them fractions of the normal sign matter. Thepattern is laid off by transversely transposing the boundary lines ofeach of said fractions, relatively to the transverse lines, betweenwhich such fraction lies, without changing the longitudinal relation ofsaid fraction to said lines. For instance, take line B of the fractionof the normal sign matter, seen through the paper between transverselines cl and c. It is seen that the corresponding line b of the patternhas its transverse distances from lines (Z and 6 respectively reversed,while the longitudinal relation of said lines B and b to the lines (Zand e are the same. The pattern thus formed may be delineated upon theback of plate 7 by transferring or copying it thereon, so that thepattern when copied on the rear face of the plate 7 bears the samerelation to the lines along which the plate is to be cut to form thestrips, as it bears to the transverse lines upon the transparent sheet.WVhen the strips are struck outward from the plate, and are viewed froma position at one side of the sign, the sign matter will appear in itsnormal form, as illustrated in Fig. 2.

lVhat I claim is:

1. A process of forming the pattern for the rear face of the plate forforming the strips of a triple sign, consisting of depicting the normalsign matter upon the face of a transparent sheet, delineating transverselines upon the sheet across the normal sign matter and at a distanceapart equal to the width of the strips of the sign to be formed, turningthe sheet with said face downward, and upon the back of the sheetdelineating the fractions of the normal sign matter seen through thesheet in positions longitudinally transposed to the positions which saidfractions bear to the transverse lines which in close them.

2. A method of making patterns for delineating characters on the rearface of the front plate of triple signs, which consists in delineatingupon the pat-tern sheet sections which correspond to the strips of thesign to be produced, delineating upon the sheet a normal character, andthen delineating upon the sections the reversed counterpart of thedelineation first placed upon each section.

RUDOLPH A. MILLER.

lVitnesses E. W. MGCALLIsTER, WVALTER F. MURRAY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

